Updated top-level interface
Cleaned up mutable graph
Updated cost functions
Updated mutablegraph again
Updated gonum graph
Gofmt'd renamed edge and node
Gofmt'd renamed edge and node
Cleaned up TileGraph
Removed empty tests from gonumgraph_test
Removed coverage tests from tilegraph_test
Updated tests
Updated internal functions
Fixed redundant declaration
Updated FloydWarshall
Converted main graph searched to use new edge API
Updated floydw tests
Fixed EdgeTo bug
Fixed search tests
Removed Degree from Graph since it was unused and updated comments
Updated documentation